Chefdenker Lasse Pyykkö kommentiert: "Once all the songs for 'Ossuarium Silhouettes Unhallowed' were written, it became clear to us that 'Sempiternal Grotesqueries' was going to be the album's opening track. Unlike on our previous records, there's no intro track on the new album, because we figured that the doomy and atmospheric riff, which kicks off 'Sempiternal Grotesqueries' (and also closes the song) would work just fine as an intro to the album. It sets the mood, and as soon as you have lit the black candles, the song grows into a gripping death doom whirlwind and you're in for a ride with the Blind Dead."